//
//  Atom.h
//  oc x
//
//  Created by Mac OS on 16-4-5.
//  Copyright (c) 2016年 oyzh. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface Atom : NSObject

@property (readonly) NSUInteger protons;
@property (readonly) NSUInteger neutrons;
@property (readonly) NSUInteger electrons;
@property (readonly) NSString *chemicalElement;

-(NSUInteger) massNumber;

@end
